What should be done if a diver experiences a delay greater than 1 minute and the first stop is deeper than 50 FSW?

When a diver experiences a delay greater than 1 minute with the first decompression stop deeper than 50 feet of sea water (FSW), rounding up the delay time and recomputing the decompression schedule is essential for safety. This approach ensures that the diver is given an appropriate amount of time to safely off-gas any absorbed nitrogen. The longer the diver stays at deeper depths without adhering to the decompression schedule, the greater the risk of decompression sickness.

By rounding up the delay time, the diver accounts for the additional nitrogen that may have dissolved into their body tissues during the unexpected delay. It is crucial to adjust the decompression schedule based on the actual time spent at depth, especially considering that any delays can impact the rates at which gases are eliminated. Therefore, calculating a new schedule based on this adjusted delay ensures a safer ascent and reduces the risk of potential diving-related injuries.

In contrast, continuing with the original decompression plan, rounding down the delay, or ascending without stops could lead to inadequate off-gassing or other hazards associated with rapid ascents, which could jeopardize the diver's safety.